I managed to open the nano editor, but I'm not sure were exactly to copy the blacklist info. And when I type the SRTG+O I only type in the letters what am I missing? I'm confused why can't there be a LibreElec whit out this problem?
Oh man, we are really going into the total basics now. 
If you open the file with nano /flash/syslinux.cfg, then watch for file content.
If there is no content (I don't have any content at my one), you can instantly start typing this:
APPEND initcall_blacklist=i915_init
If the file already has an APPEND line, add " initcall_blacklist=i915_init" at the end of that line.
After typing, find the key Strg on your keyboard. Sometimes the key is labeled as Ctrl or Control. It's on the bottom left of the keyboard.
Press that key, and while keeping it pressed, press the O key to store the config file.
After that, do the same with the X key to leave the editor.
Type reboot and press Enter to reboot LE.